Mirror mounting



June 22, 1943'. c, SHEPPA'RID MIRROR MOUNTING Original Filed March 20,1941 gwuo/vvf 070 C REE 17? 6'. SHEPPARD Patented June 22, 1943 MIERORMOUNTING Greedy C. Sheppard, Fort Lee, N. J.

Original application March. 20, 1941., .Serial No.- v 384,417. Dividedand this application June 25, 1942, Serial No. 448,455 1 (oi. se en 3Claims.

This invention relates to a mirror mounting and constitutes a divisionfrom the subject matter of my prior application for patent for Smokedetector, filed Mar. 20, 1941, .Serial No. 384,417 and issued June 30,1942, as Letters Patent No. 2,288,143.

It is one object of the invention to provide improved means for mountinga mirror in a reflector box and permitting angular adjustment of themirror in any direction necessary to bring it into proper angularrelation to another mirror.

Another object of the invention is to provide a mirror mounting of suchconstruction that the mirror may be angularly adjusted while the covercarrying the mirror is in a closed position and thus make it unnecessaryto release the cover and move it to an opened position with consequentlikelihood of escape of gases or the like from a reflector box in whichthe mirror is mounted.

Another object of the invention is to so form the mirror mounting thatan adjusting rod or equivalent implement may be engaged with an exposedportion of a spherical member forming part of the mounting and themirror easily and accurately adjusted, a cap nut being then tightened tofirmly hold the mirror in a set position.

It is another object of the invention to provide a mirror mounting whichis simple in construction, easy to adjust, and not liable to slip out ofan adjusted position when the securing nut is tightened.

While it has been stated that the improved mounting is for a mirror andit has been illustrated in connection with the mirrors of a smokedetector, it is to be understood that this only illustrates onepractical application of the in-v vention and that it may be used foradjustably mounting other articles which are to be mounted for angularadjustment when in use.

In the accompanying drawing:

Figure 1 is a sectional view showing mirrors of a smoke detector mountedfor angular adjustment in accordance with the invention.

Figure 2 is a view looking at the outer face of a reflector box cover towhich a mirror is mounted in accordance with the invention.

In the accompanying drawing, the numeral I indicates a reflector boxmounted between the upper end of a vertically disposed tube 2 and an endof a horizontally disposed tube 3. A second reflector box or vision head4 is mounted at the lower end of tube 2 and each box has an open sidenormally closed by a cover 5 hinged, as shown at 6, for swingingmovement into and out of closed position, where it is releasably securedby a belt or equivalent fastener 1 carried by the box in position forengagement through a slot 8 formed in the cover. Mirrors 9 are mountedin the boxes or casings I and l, diagonally thereof, and it is necessaryto set these mirrors in such angular position or relation to each otherthat when a person looks into the box or vision head 4 through thevision glass -I0, a clear view may be had of smoke or the like passingthrough a chimney or flue from which the tube '3 extends.

The covers 5 are of cup-shaped formation and each :carries an outwardlyprojecting neck II located icentral-ly :of the cover and formed with a:bore or central passage 'IZ through which passes a stem I3 carried bythe frame I4 of the mirror 9. The inner end portion of the stem I3 issecured through an opening in the mirror frame by nuts I5 and, at itsouter end, the stem carries a spherical head or ball I6 which rests inthe hemispherical seat or socket Il at the outer end of the bore I2. Theball or head protrudes from the socket I1 and its outer portion isreceived in a hemispherical seat or socket I8 formed through the centralportion of a cap I9 screwed upon the outer end of the neck II and, whenthe cap is tightened, the ball will be held stationary with the mirrorat a predetermined angle. Since the thickness of the stem I3 isappreciably less than the diameter of the bore I2, the mirror and itsstem may be tilted in all directions and universal angular adjustment ofthe mirror obtained by loosening the cap nut I9 and then turning theball to tilt the stem and the mirror in a desired direction. A portionof the ball is exposed through the constricted outer end of the socketI1, and this portion of the ball protrudes from the cap and is formedwith a socket 20 to receive an adjusting rod 2|. The socket 20 is formedradially of the ball directly opposite the stem I3 and, therefore, whenthe adjusting rod or equivalent implement 2| is thrust into the socket,it will be in alinement with the stem. By so forming and mounting thestem, a person looking into the box or vision head through the glass ID,may fit an end of the rod into the socket 2E] and turn the ball to tiltthe stem in any direction and thus angularly adjust the mirror withoutopening the cover. Therefore, the adjustment may be made while the coveris closed and accurately adjust the mirror while it is in the positionwhich it will occupy while the apparatus of which the mirror forms anelement, is in use. After the adjustment has been made, the cap nut 19is tightened and pressure will be exerted upon the ball to firmly holdthe mirror in a set position,

As previously stated, it is to be understood that while the invention isparticularly adapted for mounting mirrors in a smoke detector, it is notlimited to this particular us and may be used for mounting otherarticles for universal tilting movement or adjustment.

Having thus described the invention, what is claimed is:

1. In a device of the character described, a mounting member having aneck extending therefrom and formed with a bore and a hemisphericalsocket at the outer end of the bore, a cap nut screwed on the outer endof said neck and formed with a hemispherical socket registering with thesocket of the neck and for a portion of its diameter exposed through theouter face of the cap nut, a mirror having a frame formed with anopening at its center, a stem having a threaded inner end portionpassing through the opening of said frame, nuts on the stem grippinginner and outer face of the frame to firmly mount the stem axially ofthe mirror, said stem passing through the bore of the neck and having aspherical head at its outer end received in sockets of the neck and thecap nut to mount the stem for universal tilting adjustment of themirror, and the head having a portion exposed through the constrictedouter portion of the socket of the cap nut and formed with a socketextending in longitudinal alinement with the stem for removablyreceiving an adjusting implement during tilting adjustment of themirror.

2. In a device of the character described, a mounting member having aneck extending therefrom and formed with a bore and a hemisphericalsocket at the outer end of the bore, a mirror having a frame, a stemextending from the frame centrally of the mirror and through the bore ofthe neck, a spherical head at the outer end of said stem seated in thesocket, the stem being of a thickness appreciably less than the diameterof the bore to permit universal tilting adjustment of the mirror, and acap nut screwed upon the outer end portion of said neck and formed witha hemispherical socket receiving the spherical head and extendingthrough the nut to expose a portion of the head, the exposed portion ofthe head being formed with a socket opposite the stem to receive anadjusting implement, and the nut when tightened gripping the head tohold the stem and mirror in an angularly adjusted position.

3. In a device of the character described, a mounting member having arearwardly extending neck formed with a bore having a spherical socketat its rear end, an article in front of said mounting member having astem extending rearwardly therefrom through the bore of the neck andprovided at its rear end with a spherical head seated in said socket tomount the stem and the article for universal tilting adjustment, and aclamping member screwed upon the rear end portion of the neck'and formedwith a socket receiving the head and for a portion of its diameter beingopen at its rear end, a portion of the head being exposed through theopen rear end of the socket of the clamping member; means for adjustingsaid article comprising a socket in the exposed portion of the sphericalhead adapted to removably receive an adjusting implement whereby thestem and the article may be tilted to an angularly adjusted position inwhich it is held when the clamping member is tightened.

CREEDY C. SHEPPARD.

